---
title: How do I use the Mounjaro injection pen?
description: Mounjaro is administered once a week as a subcutaneous injection under the skin of your stomach, thigh, or upper arm. Importantly, you must remember to prime the Mounjaro pen device before every single dose you take to ensure accurate delivery.
---

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# How do I use the Mounjaro injection pen?

Mounjaro is administered once a week as a subcutaneous injection under the skin of your stomach, thigh, or upper arm. Importantly, you must remember to prime the Mounjaro pen device before every single dose you take to ensure accurate delivery.

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